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3 years ago

Match the atoms which might substitute for one another. Match the items in the left column to the items in the right column.

1 answer:

8 0

If you want to answer this question, all you have to do is take a look at the periodic table. <span>An element might substitute for another element if it is from the same family/column on the periodic table.
So, these are the atoms which might substitute for one another:
1. Si = C.C
2. K = A. Na
3. Nb = B. V
4. Cu = D. Ag
5. P = F. As
6. Mg = E. Ca
</span>

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You need 4.0 ounces of a steroid ointment. if there are 16 oz in 1 lb, how many grams of ointment does the pharmacist need to pr

Bond [772]

The given units are the units of masses which are interconvertable.

It is given that:

$1 lb = 16 oz$

Now, converting $kg to lb$ :

Since, $1 kg = 2.20462 lb$

So, $\frac{0.0625 lb}{1 oz}\times \frac{1 kg}{2.20462 lb}$

Now converting $kg to g$ :

Since, 1 kg = 1000 g

So, $\frac{0.0625 lb}{1 oz}\times \frac{1 kg}{2.20462 lb}\times \frac{1000 g}{1 kg} = 28.349 \frac{g}{oz}$

For $4 oz$ :

$28.349\frac{g}{oz} \times 4 oz = 113.396 g$

Thus, $113.396 g$ of ointment needed to be prepared by the pharmacist.

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3 years ago

Guess how many water molecules self-ionize in one liter of water! a) 7 moles b) 1 mole c) 10,000,000 moles d) 0.0000001 moles

Rudiy27

Answer:

Explanation:

This seems like a weird question

Water is held together by covalent bonds. The amount of energy required to break these bonds so that water would split into it's respective ions is pretty high. The chances that any one of the molecules floating in 1L of water get enough energy to spontaneously burst into it's ions is slim to none.

So, D) seems like the most likely answer

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3 years ago

What is the difference between fusion and melting?

photoshop1234 [79]

Fusion is joining two or more things together in resulting of the form of one thing
Melting is to make something liquefied by the use of heat

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3 years ago

Why is it permissible to use a wet bottle when first obtaining your kmno4 solution?

Murrr4er [49]

For the answer to the question above, well presumably because the exact concentration of the composition KMnO4 solution doesn't matter. <span>If the concentration of the KMnO4 solution is important (usually in titrations etc.) then it is not allowed to use a wet bottle. The water in the bottle will dilute the KMnO4 solution and change the concentration of the said compound.</span>

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4 years ago

What is the mass of 1.72 moles of sodium nitrate? Use the periodic table and the polyatomic ion resource. A. 85.0 g B. 91.2 g C.

Mrac [35]

The answer is C. 146g because you add all of the masses of the individual elements and then mulyiply by 1.72 to get your answer.

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3 years ago

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